US Bridges

SH 146 over Dayton Canal

Good

Liberty County, Texas · 0.5 MI N of FM 1413 · Structure no. 201460038901017

Built
1936
89 years old, rebuilt 2011
Condition
Good
inspected April 2024
Type
Culvert
Concrete
Length
22 ft
4 main spans
Daily traffic
13,246
2022 count
Owner
State
State Highway Agency

About this bridge

SH 146 over Dayton Canal is a concrete culvert carrying SH 146 over Dayton Canal in Liberty County, Texas. It was built in 1936 and reconstructed in 2011, so it is 89 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13,246 vehicles a day, roughly 13% of them trucks, projected to reach 14,240 by 2033. The structure is 22 ft (6.7 m) long and 151 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSH 146
CrossesDayton Canal
Location0.5 MI N of FM 1413
RouteState Highway 146
StateTexas
Coordinates29.96122, -94.9064
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span5 ft (1.5 m)
Deck width151 ft (46.1 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,246 (2022)
Projected traffic14,240 by 2033
Trucks13%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 146 over Dayton Canal built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 2011.

What condition is SH 146 over Dayton Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does SH 146 over Dayton Canal carry?

About 13,246 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is SH 146 over Dayton Canal?

The structure is 22 ft (6.7 m) long with a longest span of 5 ft (1.5 m) and a deck 151 ft wide.

Who owns SH 146 over Dayton Canal?

It is owned by the State Highway Agency.